Dear jpetzke,
Sorry to hear about your son's WPW. I am an adult cardiologist and I do not see children. However, we don't usually treat adults for WPW who have not experienced any symptoms or episodes of SVT. Amiodarone is a medication with numerous side effects and should be used cautiously. Virtually everyone on amiodarone has side effects.
I think you need to be certain that your son's diagnosis of WPW is correct. A number of people are referred here with a diagnosis of WPW and actually turn out not to have it. I would suggest seeing a pediatric electrophysiologist at a large university based medical center for a definitive diagnosis and treatment plan.
Thanks for your question,
CCF-MD-KE